PT-2026-58279 · Microsoft · Office Excel

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-58618

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel (affected versions not specified)

Description A heap-based buffer overflow occurs when a program writes more data to a heap memory block than it can hold, potentially corrupting memory. This issue allows an unauthorized attacker to execute arbitrary code locally or remotely, affecting the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-58618

Affected Products

Office Excel

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-58618 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58618 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-58618 · Security Note